Looks like I've cured my rattle. Having already removed the side screen polar seal and replaced it with some really thick neoprene to take up more than enough slack to rely on tension to stop the rattle, I didn't like the look of it, and felt it could put a strain on the side screen fittings. I've removed this and replaced it with thinner neoprene, on both sides that the sides reen meets the pillar, but the key was adjusting the side screens so that when the door is closed, the front of the sidescreen pushes firmly into the neoprene and is held in with friction. I then used very thin slices of the neoprene which I pushed into the top channel where the fixed perspex sits to stop these rattle also. Bingo, no more rattling. Next rattle to cure is the hood frame as the rivots are very slightly lose and rattle on uneven ground. I guess some kind of strap would cure this.